Respiratory system

To obtain oxygen and get rid of carbon dioxide we use ....

• Circulatory system

• Excretory system

• Respiratory system

• Digestive system

When we inhale we are...

• breathing in

• letting air out

When the air comes in, our diaphragm..

• Contracts

• Relaxes

When we let the air out, our diaphragm...

• Contracts

• Relaxes

The main organ of our respiratory system is...

• heart

• stomach

• bladder

• lungs

Nº1

• trachea

• nose

• lungs

• bronchi

Nº4

• bronchi

• larynx

• trachea

• oesophagus

The gas exchange takes place in the...

• bronchioles

• bronchi

• capillaries

• alveoli

The alveoli are...

• tiny capillaries

• tiny air sacks

• tiny vessels

• tiny cells

What passes from the alveoli to the capillaries?

• carbon dioxide

• oxygen

• oxigen

• nutrients